SELECT 
  product_descriptions.product_id, 
  product_descriptions.short_description, 
  IF(
    product_descriptions.short_description = '' 
    OR product_descriptions.short_description IS NULL, 
    product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  product_descriptions 
WHERE 
  product_descriptions.product_id IN (
    258290, 258250, 258292, 258295, 258289, 
    258291, 258299, 258297, 258298, 258296, 
    258293
  ) 
  AND product_descriptions.lang_code = 'en'

Query time 0.00054

JSON explain

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      "key_length": "11",
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      "rows_produced_per_join": 11,
      "filtered": "100.00",
      "cost_info": {
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        "data_read_per_join": "56K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`goimagine`.`product_descriptions`.`product_id` in (258290,258250,258292,258295,258289,258291,258299,258297,258298,258296,258293)) and (`goimagine`.`product_descriptions`.`lang_code` = 'en'))"
    }
  }
}

Result

product_id short_description full_description
258250 <p>Based on the famous wild horse "Picasso", this original piece is on cut, live edge wood and measures 22"x10".</p>
258289 <p>Placing orders for the Color Collection Ornaments! You'll get all 4 ornaments. Each is made to order, no two will be identical! Each piece is 3.5-4" on wood slices.&nbsp;</p>
258290 <p>Orders can now be placed for my Character Collection! You'll get all 4 ornaments, each one unique and hand painted. No two will be identical! Each ornament is 3.5-4" on wood slices.&nbsp;</p>
258291 <p>3.5-4" Nativity Ornament on wood slices. Made to order. Each one is individually hand painted, no two are identical!&nbsp;</p>
258292 <p>3.5-4" Angel Ornament on wood slices. Made to order. Each one is individually hand painted, no two are identical!&nbsp;</p>
258293 <p>3.5-4" Sunrise Cross Ornament on wood slices. Made to order. Each one is individually hand painted, no two are identical!&nbsp;</p>
258295 <p>3.5-4" Church Ornament on wood slices. Made to order. Each one is individually hand painted, no two are identical!&nbsp;</p>
258296 <p>3.5-4" Cardinal Ornament on wood slices. Made to order. Each one is individually hand painted, no two are identical!&nbsp;</p>
258297 <p>3.5-4" Snowman Ornament on wood slices. Made to order. Each one is individually hand painted, no two are identical!&nbsp;</p>
258298 <p>3.5-4" Reindeer Ornament on wood slices. Made to order. Each one is individually hand painted, no two are identical!&nbsp;</p>
258299 <p>3.5-4" Christmas Tree Ornament on wood slices. Made to order. Each one is individually hand painted, no two are identical!&nbsp;</p>